.net 确定使用 ContextMenuStrip 的控件

For a ContextMenu:

问题在于，sender参数指向的是被点击的上下文菜单上的item，而不是上下文菜单本身.

不过，这是一个简单的修复，因 for each MenuItem都公开一个GetContextMenu method，它会告诉您哪个ContextMenu包含该菜单项.

将代码更改为以下内容:

private void MenuViewDetails_Click(object sender, EventArgs e)
{
    // Try to cast the sender to a MenuItem
    MenuItem menuItem = sender as MenuItem;
    if (menuItem != null)
    {
        // Retrieve the ContextMenu that contains this MenuItem
        ContextMenu menu = menuItem.GetContextMenu();

        // Get the control that is displaying this context menu
        Control sourceControl = menu.SourceControl;
    }
}

For a ContextMenuStrip:

如果你用ContextMenuStrip而不是ContextMenu，情况会有轻微变化.这两个控件彼此不相关，不能将一个控件的实例强制转换为另一个控件的实例.

与之前一样，被点击的item仍然会在sender参数中返回，因此您必须确定拥有这个单独菜单项的ContextMenuStrip.你可以用Owner property来做.最后，您将使用SourceControl property来确定哪个控件正在显示上下文菜单.

修改代码如下:

private void MenuViewDetails_Click(object sender, EventArgs e)
{
     // Try to cast the sender to a ToolStripItem
     ToolStripItem menuItem = sender as ToolStripItem;
     if (menuItem != null)
     {
        // Retrieve the ContextMenuStrip that owns this ToolStripItem
        ContextMenuStrip owner = menuItem.Owner as ContextMenuStrip;
        if (owner != null)
        {
           // Get the control that is displaying this context menu
           Control sourceControl = owner.SourceControl;
        }
     }
 }